How can I get what I edited when I run the game engine?
It seems that you do not have your material display setup correctly. At the bottom of you Blender window,just above the Time Line, you will see a Box the reads, "Object Mode". Next to this box will be a white ball. Left click this white ball and select Texture. Now when you press P to view your animation you should be able to see everything. You may also press the N key to bring out your right panel. There is a section there labeled Shading. Click on Shading and put a check next to "Textured Solid". Then click the box just above this and select from the list GLSL. This should work for you! Everyone that uses Blender goes through these gates which is needed if you will progress farther into the use of this Great Free Software. Persistence is the key to becoming great at using Blender. So do not give up! Just move forward! :O)